1. 串口控制

using System;
using System.IO.Ports;
using System.Windows.Forms;namespace 串口控制
{public partial class Form1 : Form{//device1const byte DeviceOpen1 = 0x01;const byte DeviceClose1 = 0x81;//device2const byte DeviceOpen2 = 0x02;const byte DeviceClose2 = 0x82;//device3const byte DeviceOpen3 = 0x03;const byte DeviceClose3 = 0x83;//serialport write bufferbyte[] SerialPortDataBuffer = new byte[1];public Form1(){InitializeComponent();}//扫描并将串口添加至下拉列表private void button1_Click(object sender, EventArgs e){SearchAndAddSerialToComboBox(serialPort1, comboBox1);}private void Form1_Load(object sender, EventArgs e){SearchAndAddSerialToComboBox(serialPort1, comboBox1);}//将可用端口号添加到ComboBoxprivate void SearchAndAddSerialToComboBox(SerialPort MyPort, ComboBox MyBox){//最多容纳20个，太多会影响调试效率string Buffer;MyBox.Items.Clear();for(int i = 1; i < 20; i++){try{Buffer = "COM" + i.ToString();MyPort.PortName = Buffer;MyPort.Open();//如果失败后面代码不会执行MyBox.Items.Add(Buffer);MyPort.Close();}catch{}}MyBox.SelectedIndex = 0;}private void button2_Click(object sender, EventArgs e){if (serialPort1.IsOpen){try{serialPort1.Close();}catch{ }button2.Text = "打开串口";}else{try{serialPort1.PortName = comboBox1.Text;serialPort1.Open();button2.Text = "关闭串口";}catch{MessageBox.Show("串口打开失败", "错误");}}}private void WriteByteToSerialPort(byte data){byte[] Buffer = new byte[2] { 0x00, data };if (serialPort1.IsOpen){try{serialPort1.Write(Buffer, 0, 2);}catch{MessageBox.Show("串口数据发送出错，请检查", "错误");}}else{MessageBox.Show("串口未打开，请打开串口", "错误");}}private void button3_Click(object sender, EventArgs e){int i = 0;try{i = Convert.ToInt32(textBox1.Text.Substring(0, textBox1.Text.Length));}catch{MessageBox.Show("请输入正确的数字");return;}if (serialPort1.IsOpen){if(i == 0){return;}else{timer1.Interval = i * 1000;timer1.Start();button3.Enabled = false;}}WriteByteToSerialPort(DeviceOpen1);}private void button4_Click(object sender, EventArgs e){try{timer1.Stop();//如果定时器没开，则错误处理}catch{}button3.Enabled = true;WriteByteToSerialPort(DeviceClose1);}private void button5_Click(object sender, EventArgs e){WriteByteToSerialPort(DeviceOpen2);}private void button6_Click(object sender, EventArgs e){WriteByteToSerialPort(DeviceClose2);}private void button7_Click(object sender, EventArgs e){WriteByteToSerialPort(DeviceOpen3);}private void button8_Click(object sender, EventArgs e){WriteByteToSerialPort(DeviceClose3);}private void timer1_Tick(object sender, EventArgs e){button3.Enabled = true;timer1.Stop();WriteByteToSerialPort(DeviceClose1);}}
}

2. 带校验的串口开关控制

using System;
using System.Drawing;
using System.IO.Ports;
using System.Windows.Forms;namespace ReplyAndControl
{public partial class Form1 : Form{byte DataSended = 0;byte[] DataToSend = new byte[] { 0x01, 0x02, 0x03 };public Form1(){InitializeComponent();System.Windows.Forms.Control.CheckForIllegalCrossThreadCalls = false;serialPort1.DataReceived += new SerialDataReceivedEventHandler(SerialPortDataReveived);}private void SerialPortDataReveived(object sender, SerialDataReceivedEventArgs e){byte DataReceived = (byte)(serialPort1.ReadByte());//收到数据关闭定时器try{timer1.Stop();}catch{}SetButtonColor(DataReceived);}//判断数据校验是否成功private void SetButtonColor(int which){switch (which){case 0x01:button2.BackColor = Color.Green;break;case 0x11:button2.BackColor = Color.Red;break;case 0x02:button3.BackColor = Color.Green;break;case 0x12:button3.BackColor = Color.Red;break;case 0x03:button4.BackColor = Color.Green;break;case 0x13:button4.BackColor = Color.Red;break;case 0x04:button2.BackColor = Color.Green;button3.BackColor = Color.Green;button4.BackColor= Color.Green;break;case 0x14:button2.BackColor = Color.Red;button3.BackColor = Color.Red;button4.BackColor = Color.Red;break;default:break;}}private void Button_Click(object sender, EventArgs e){Button MyButton = (Button)sender;DataSended = Convert.ToByte(MyButton.Tag);//MyButton.Enabled = false;SendDataToSerialPort(serialPort1, DataToSend[DataSended - 1]);}private void SendDataToSerialPort(SerialPort MyPort, byte DataToSend){byte[] DatasToWrite = new byte[] { DataToSend };if (serialPort1.IsOpen){try{MyPort.Write(DatasToWrite, 0, 1);timer1.Interval = 3 * 1000;timer1.Start();}catch{MessageBox.Show("串口数据写入错误", "错误");}}}private void timer1_Tick(object sender, EventArgs e){string MyStr = DataSended.ToString() + "路数据校验超时，请检查";timer1.Stop();MessageBox.Show(MyStr, "错误");}private void button1_Click(object sender, EventArgs e){if (serialPort1.IsOpen){try{serialPort1.Close();}catch{}button1.Text = "打开串口";}else{try{serialPort1.PortName = comboBox1.Text;serialPort1.Open();}catch{MessageBox.Show("串口打开错误，请检查", "错误");}button1.Text = "关闭窗口";}}private void Form1_Load(object sender, EventArgs e){string Buffer;comboBox1.Items.Clear();for (int i = 1; i < 20; i++){try{Buffer = "COM" + i.ToString();serialPort1.PortName = Buffer;serialPort1.Open();//如果失败后面代码不会执行comboBox1.Items.Add(Buffer);serialPort1.Close();}catch{}}comboBox1.SelectedIndex = 0;}}
}